Techniques for performing measurement relaxation

Abstract

Methods, systems, and devices for wireless communications are described. A user equipment (UE) may receive an indication that the UE is to perform radio resource management (RRM) measurements at a first periodicity. The UE may identify an RRM measurement relaxation grouping to which the UE belongs based on at least one of a mobility of the UE or a location of the UE within a cell, such as whether the UE is near a cell-edge, or whether the UE is stationary or moving in accordance with low-mobility, or a combination thereof. The UE may determine a first relaxation parameter from a plurality of relaxation parameters based on measurement relaxation criterion associated with the cell, where the plurality of relaxation parameters may be associated with the RRM measurement relaxation grouping. The UE may perform the RRM measurements at a second periodicity that is based on the first relaxation parameter.

What is claimed is: 
     
       1. A method for wireless communications at a user equipment (UE), comprising:
 receiving an indication that the UE is to perform radio resource management measurements at a first periodicity; 
 identifying, from a plurality of radio resource management measurement relaxation groupings, a radio resource management measurement relaxation grouping to which the UE belongs based on at least one of a mobility of the UE or a location of the UE within a cell; 
 determining a first relaxation parameter from a plurality of relaxation parameters based at least in part on a measurement relaxation criterion associated with the cell, wherein each of the plurality of radio resource management measurement relaxation groupings is associated with a respective relaxation parameter of the plurality of relaxation parameters, and wherein the measurement relaxation criterion is based at least in part on a duration during which the UE belongs to the radio resource management measurement relaxation grouping; and 
 performing the radio resource management measurements at a second periodicity that is based at least in part on the first relaxation parameter. 
 
     
     
       2. The method of  claim 1 , further comprising:
 identifying the measurement relaxation criterion from a set of measurement relaxation criteria based at least in part on the radio resource management measurement relaxation grouping. 
 
     
     
       3. The method of  claim 1 , further comprising:
 determining a second relaxation parameter from the plurality of relaxation parameters based at least in part on satisfying the measurement relaxation criterion at a second time after a first time at which the measurement relaxation criterion was satisfied to trigger determination of the first relaxation parameter, the second relaxation parameter associated with a longer periodicity than the second periodicity. 
 
     
     
       4. The method of  claim 3 , wherein the measurement relaxation criterion comprises a set of thresholds, each threshold of the set of thresholds is a cell selection delta threshold. 
     
     
       5. The method of  claim 4 , wherein each threshold from the set of thresholds is associated with a different multiplier to be applied to the first relaxation parameter. 
     
     
       6. The method of  claim 5 , wherein the set of thresholds comprises at least a first threshold and a second threshold, the first threshold associated with a smaller multiplier than the second threshold. 
     
     
       7. The method of  claim 4 , wherein the set of thresholds comprises an ordered list of thresholds, the UE is configured to use a first threshold at the first time and a second threshold at the second time in accordance with the ordered list of thresholds, and the first threshold is greater than the second threshold. 
     
     
       8. The method of  claim 1 , further comprising:
 determining a second relaxation parameter from the plurality of relaxation parameters based at least in part on failure to satisfy the measurement relaxation criterion at a second time after a first time at which the measurement relaxation criterion was satisfied to trigger determination of the first relaxation parameter, the second relaxation parameter associated with a shorter periodicity than the second periodicity. 
 
     
     
       9. The method of  claim 1 , wherein determining the first relaxation parameter further comprises:
 determining a discrete relaxation scaling factor from a plurality of discrete relaxation scaling factors based at least in part on the measurement relaxation criterion associated with the cell. 
 
     
     
       10. The method of  claim 1 , wherein determining the first relaxation parameter further comprises:
 calculating a relaxation scaling factor in accordance with a relaxation scaling factor equation, wherein the relaxation scaling factor is a function of a maximum relaxation scaling factor, a cell selection reception level value, a reference cell selection reception level value, a cell selection quality value, a reference cell selection quality value, or a combination thereof. 
 
     
     
       11. The method of  claim 10 , further comprising:
 receiving, from a base station, a message indicating the relaxation scaling factor equation. 
 
     
     
       12. The method of  claim 10 , wherein the reference cell selection reception level value and the reference cell selection quality value are associated with the radio resource management measurement relaxation grouping. 
     
     
       13. The method of  claim 10 , wherein the relaxation scaling factor equation for calculating the relaxation scaling factor is linear or non-linear. 
     
     
       14. The method of  claim 10 , wherein the relaxation scaling factor equation for calculating the relaxation scaling factor is a transform function. 
     
     
       15. The method of  claim 1 , wherein identifying the radio resource management measurement relaxation grouping further comprises:
 identifying that the UE meets a set of criteria for the radio resource management measurement relaxation grouping, the radio resource management measurement relaxation grouping identified from the plurality of radio resource management measurement relaxation groupings. 
 
     
     
       16. The method of  claim 15 , wherein the plurality of radio resource management measurement relaxation groupings comprise a stationary and not-at-cell-edge group, a stationary group, a low-mobility and not-at-cell-edge group, a low-mobility group, and a not-at-cell-edge group. 
     
     
       17. The method of  claim 1 , further comprising:
 calculating the second periodicity by multiplying the first relaxation parameter with the first periodicity. 
 
     
     
       18. The method of  claim 1 , further comprising:
 receiving, from a base station, a message indicating the plurality of radio resource management measurement relaxation groupings and a condition for the UE to satisfy for each of the plurality of radio resource management measurement relaxation groupings, the condition associated with UE mobility or UE location within the cell. 
 
     
     
       19. The method of  claim 1 , further comprising:
 receiving, from a base station, a message indicating the plurality of relaxation parameters associated with the radio resource management measurement relaxation grouping. 
 
     
     
       20. The method of  claim 1 , further comprising:
 measuring one or more reference signal parameters associated with the cell, the one or more reference signal parameters comprising reference signal received power measurements, reference signal received quality measurements, or both; and 
 calculating one or more cell selection parameters based at least in part on the one or more reference signal parameters. 
 
     
     
       21. The method of  claim 20 , further comprising:
 comparing the one or more cell selection parameters to the measurement relaxation criterion after each of a plurality of time intervals, wherein the plurality of time intervals are uniform or non-uniform; and 
 determining that the one or more cell selection parameters satisfies the measurement relaxation criterion. 
 
     
     
       22. The method of  claim 20 , wherein the one or more cell selection parameters comprise a cell selection reception level value and a reference cell selection reception level value. 
     
     
       23. The method of  claim 1 , wherein the UE performs the radio resource management measurements in accordance with the first relaxation parameter while the UE is in a radio resource control idle or inactive state. 
     
     
       24. An apparatus for wireless communications, comprising:
 a processor; 
 memory coupled with the processor; and 
 instructions stored in the memory and executable by the processor to cause the apparatus to:
 receive an indication that a user equipment (UE) is to perform radio resource management measurements at a first periodicity; 
 identify, from a plurality of radio resource management measurement relaxation groupings, a radio resource management measurement relaxation grouping to which the UE belongs based on at least one of a mobility of the UE or a location of the UE within a cell; 
 determine a first relaxation parameter from a plurality of relaxation parameters based at least in part on a measurement relaxation criterion associated with the cell, wherein each of the plurality of radio resource management measurement relaxation groupings is associated with a respective relaxation parameter of the plurality of relaxation parameters, and wherein the measurement relaxation criterion is based at least in part on a duration during which the UE belongs to the radio resource management measurement relaxation grouping; and 
 perform the radio resource management measurements at a second periodicity that is based at least in part on the first relaxation parameter. 
 
 
     
     
       25. The apparatus of  claim 24 , wherein the instructions are further executable by the processor to cause the apparatus to:
 identify the measurement relaxation criterion from a set of measurement relaxation criteria based at least in part on the radio resource management measurement relaxation grouping. 
 
     
     
       26. The apparatus of  claim 24 , wherein the instructions are further executable by the processor to cause the apparatus to:
 determine a second relaxation parameter from the plurality of relaxation parameters based at least in part on satisfying the measurement relaxation criterion at a second time after a first time at which the measurement relaxation criterion was satisfied to trigger determination of the first relaxation parameter, the second relaxation parameter associated with a longer periodicity than the second periodicity. 
 
     
     
       27. The apparatus of  claim 24 , wherein the instructions are further executable by the processor to cause the apparatus to:
 determine a second relaxation parameter from the plurality of relaxation parameters based at least in part on failure to satisfy the measurement relaxation criterion at a second time after a first time at which the measurement relaxation criterion was satisfied to trigger determination of the first relaxation parameter, the second relaxation parameter associated with a shorter periodicity than the second periodicity. 
 
     
     
       28. The apparatus of  claim 24 , wherein the instructions to determine the first relaxation parameter are further executable by the processor to cause the apparatus to:
 determine a discrete relaxation scaling factor from a plurality of discrete relaxation scaling factors based at least in part on the measurement relaxation criterion associated with the cell. 
 
     
     
       29. An apparatus for wireless communications, comprising:
 means for receiving an indication that a user equipment (UE) is to perform radio resource management measurements at a first periodicity; 
 means for identifying, from a plurality of radio resource management measurement relaxation groupings, a radio resource management measurement relaxation grouping to which the UE belongs based on at least one of a mobility of the UE or a location of the UE within a cell; 
 means for determining a first relaxation parameter from a plurality of relaxation parameters based at least in part on a measurement relaxation criterion associated with the cell, wherein each of the plurality of radio resource management measurement relaxation groupings is associated with a respective relaxation parameter of the plurality of relaxation parameters, and wherein the measurement relaxation criterion is based at least in part on a duration during which the UE belongs to the radio resource management measurement relaxation grouping; and 
 means for performing the radio resource management measurements at a second periodicity that is based at least in part on the first relaxation parameter. 
 
     
     
       30. A non-transitory computer-readable medium storing code for wireless communications, the code comprising instructions executable by a processor to:
 receive an indication that a user equipment (UE) is to perform radio resource management measurements at a first periodicity; 
 identify, from a plurality of radio resource management measurement relaxation groupings, a radio resource management measurement relaxation grouping to which the UE belongs based on at least one of a mobility of the UE or a location of the UE within a cell; 
 determine a first relaxation parameter from a plurality of relaxation parameters based at least in part on a measurement relaxation criterion associated with the cell, wherein each of the plurality of radio resource management measurement relaxation groupings is associated with a respective relaxation parameter of the plurality of relaxation parameters, and wherein the measurement relaxation criterion is based at least in part on a duration during which the UE belongs to the radio resource management measurement relaxation grouping; and 
 perform the radio resource management measurements at a second periodicity that is based at least in part on the first relaxation parameter.